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# gp_msgs_ext samba gpo policy
# Copyright (C) David Mulder <dmulder@suse.com> 2020
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
from samba.gp.gpclass import gp_pol_ext, gp_misc_applier
class gp_msgs_ext(gp_pol_ext, gp_misc_applier):
def unapply(self, guid, cdir, attribute, value):
if attribute not in ['motd', 'issue']:
raise ValueError('"%s" is not a message attribute' % attribute)
data = self.parse_value(value)
mfile = os.path.join(cdir, attribute)
if os.path.exists(mfile):
with open(mfile, 'r') as f:
current = f.read()
else:
current = ''
# Only overwrite the msg if it hasn't been modified. It may have been
# modified by another GPO.
if 'new_val' not in data or current.strip() == data['new_val'].strip():
msg = data['old_val']
with open(mfile, 'w') as w:
if msg:
w.write(msg)
else:
w.truncate()
self.cache_remove_attribute(guid, attribute)
def apply(self, guid, cdir, entries):
section_name = 'Software\\Policies\\Samba\\Unix Settings\\Messages'
for e in entries:
if e.keyname == section_name and e.data.strip():
if e.valuename not in ['motd', 'issue']:
raise ValueError('"%s" is not a message attribute' %
e.valuename)
mfile = os.path.join(cdir, e.valuename)
if os.path.exists(mfile):
with open(mfile, 'r') as f:
old_val = f.read()
else:
old_val = ''
# If policy is already applied, skip application
if old_val.strip() == e.data.strip():
return
with open(mfile, 'w') as w:
w.write(e.data)
data = self.generate_value(old_val=old_val, new_val=e.data)
self.cache_add_attribute(guid, e.valuename, data)
def __str__(self):
return 'Unix Settings/Messages'
def process_group_policy(self, deleted_gpo_list, changed_gpo_list,
cdir='/etc'):
for guid, settings in deleted_gpo_list:
if str(self) in settings:
for attribute, msg in settings[str(self)].items():
self.unapply(guid, cdir, attribute, msg)
for gpo in changed_gpo_list:
if gpo.file_sys_path:
section_name = 'Software\\Policies\\Samba\\Unix Settings\\Messages'
pol_file = 'MACHINE/Registry.pol'
path = os.path.join(gpo.file_sys_path, pol_file)
pol_conf = self.parse(path)
if not pol_conf:
continue
self.apply(gpo.name, cdir, pol_conf.entries)
def rsop(self, gpo):
output = {}
if gpo.file_sys_path:
section_name = 'Software\\Policies\\Samba\\Unix Settings\\Messages'
pol_file = 'MACHINE/Registry.pol'
path = os.path.join(gpo.file_sys_path, pol_file)
pol_conf = self.parse(path)
if not pol_conf:
return output
for e in pol_conf.entries:
if e.keyname == section_name and e.data.strip():
mfile = os.path.join('/etc', e.valuename)
output[mfile] = e.data
return output
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